diff --git a/liberty/InternalPower.cc b/liberty/InternalPower.cc
index f490c32a..02f2d711 100644
--- a/liberty/InternalPower.cc
+++ b/liberty/InternalPower.cc
@@ -36,11 +36,11 @@ InternalPowerAttrs::~InternalPowerAttrs()
 void
 InternalPowerAttrs::deleteContents()
 {
-  for (auto tr_index : RiseFall::rangeIndex()) {
-    InternalPowerModel *model = models_[tr_index];
-    if (model)
-      delete model;
-  }
+  InternalPowerModel *rise_model = models_[RiseFall::riseIndex()];
+  InternalPowerModel *fall_model = models_[RiseFall::fallIndex()];
+  delete rise_model;
+  if (fall_model != rise_model)
+    delete fall_model;
   if (when_)
     when_->deleteSubexprs();
   stringDelete(related_pg_pin_);
diff --git a/liberty/LibertyReader.cc b/liberty/LibertyReader.cc
index 1b1f0fda..59841716 100644
--- a/liberty/LibertyReader.cc
+++ b/liberty/LibertyReader.cc
@@ -4543,8 +4543,10 @@ LibertyReader::endPower(LibertyGroup *)
 {
   if (table_) {
     TableModel *table_model = new TableModel(table_, scale_factor_type_, rf_);
-    internal_power_->setModel(RiseFall::rise(), new InternalPowerModel(table_model));
-    internal_power_->setModel(RiseFall::fall(), new InternalPowerModel(table_model));
+    // Share the model for rise/fall.
+    InternalPowerModel *power_model = new InternalPowerModel(table_model);
+    internal_power_->setModel(RiseFall::rise(), power_model);
+    internal_power_->setModel(RiseFall::fall(), power_model);
   }
   endTableModel();
 }